The purpose of grounding electrical circuits is to

The purpose of grounding electrical circuits is to

• A. Protect equipment from damage
• B. Protect the building from lightning
• C. Carry the unbalanced load
• D. Lower circuit potential to ground

Answer: (D)

Grounding provides a safe reference by tying the electrical system to earth and giving fault currents a low-impedance path to ground. This keeps exposed surfaces near earth potential, reducing shock risk, and allows protective devices to sense a fault and trip quickly to limit damage. While grounding can help with equipment protection and is part of lightning protection strategies, its primary role in circuits is to establish a zero reference and provide a reliable path for fault currents, rather than carrying normal load current.

Grounding provides a safe reference by tying the electrical system to earth and giving fault currents a low-impedance path to ground. This keeps exposed surfaces near earth potential, reducing shock risk, and allows protective devices to sense a fault and trip quickly to limit damage. While grounding can help with equipment protection and is part of lightning protection strategies, its primary role in circuits is to establish a zero reference and provide a reliable path for fault currents, rather than carrying normal load current.